Thanks David.. really useful I use a 6d and yep all red ring lens's, so the thinking is can I do 2 things... 1 is photography via the dslr and a specialist astrophotography lens and 2 deeper zoom images via a telescope. Although I'm assuming a lot from telescopes and my ability to use them i.e that telescope like photography is a trial and error till you figure out what you like to take.
With me having a son, I'm hoping to use the telescope to take and view recognisable objects to a child i.e. moon, some planets I.e. What a 10yr old would know, then the question is what should I look for in the telescope I e. Focal length fstop score which brands are best for tripod rigidity and stopping zoom creep ...
But that's me assuming photography and telescopes cross some tech paths..